TP-LINK WVR/WAR/ER pptp_server.lua pptphellointerval command injection

Summaryinfo

A vulnerability was found in TP-LINK WVR, WAR and ER. It has been declared as critical. This affects an unknown function of the file pptp_server.lua. The manipulation of the argument pptphellointerval as part of Variable results in command injection. This vulnerability was named CVE-2017-15637. The attack may be performed from remote. There is no available exploit.

Detailsinfo

A vulnerability was found in TP-LINK WVR, WAR and ER (Wireless LAN Software) (version now known). It has been classified as critical. Affected is some unknown processing of the file pptp_server.lua. The manipulation of the argument pptphellointerval as part of a Variable leads to a command injection vulnerability. CWE is classifying the issue as CWE-77. The product constructs all or part of a command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended command when it is sent to a downstream component. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

TP-Link WVR, WAR and ER devices allow remote authenticated administrators to execute arbitrary commands via command injection in the pptphellointerval variable in the pptp_server.lua file.

The bug was discovered 01/10/2018. The weakness was presented 01/11/2018 as not defined posting (Bugtraq). The advisory is shared for download at securityfocus.com. This vulnerability is traded as CVE-2017-15637 since 10/19/2017. It is possible to launch the attack remotely. Required for exploitation is a authentication. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1202.

The vulnerability was handled as a non-public zero-day exploit for at least 1 days. During that time the estimated underground price was around $0-$5k.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

See VDB-111744, VDB-111745, VDB-111746 and VDB-111747 for similar entries. VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Type

• Wireless LAN Software

Vendor

• TP-LINK

Name

• ER
• WAR
• WVR

License

• commercial

Website

• Vendor: https://www.tp-link.com/

CPE 2.3info

• 🔍
• 🔍
• 🔍

CPE 2.2info

• 🔍
• 🔍
• 🔍

CVSSv4info

CVSSv3info

CVSSv2info

Exploitinginfo

Threat Intelligenceinfo

Countermeasuresinfo

Timelineinfo

Sourcesinfo

Entryinfo

VulDB is the best source for vulnerability data and more expert information about this specific topic.

Discussion